“UK nationals were more concentrated in the public administration, education and health sector [29 percent], compared with foreign nationals [23 percent],” the ONS figures showed, which come from the 2011 census.

The study also revealed that 90 percent of immigrants, nearly 3.6 million, living in the UK described their knowledge of English as “well, very well, or as their main language” while only 1.7 percent of immigrants, about 70,000, said they could not speak English at all.

This comes as Britain’s Home Office’s backlog of half a million unresolved immigration and asylum cases will take almost four decades to clear.